\documentclass{beamer}
\usepackage{CJKutf8}
\usetheme{Warsaw}
\usecolortheme{lily}
\title[Test Presentation]{Intro\\How}
\author{FAN Kai}
\institute{CNDS, Peking University}
\date{April 22, 2009}
\begin{document}

\begin{frame}[label=title]
\titlepage
\end{frame}

\section{S1}

\subsection{SS1}

\begin{frame}{Intro}
just a test ...
\begin{itemize}
\item i1
\item i2
\pause \item i3
\item<2-3> item23
\item<4> item4
\item<1-5> item15
\end{itemize}
\begin{itemize}[<+->]
\item T
\item E
\item X
\end{itemize}
\end{frame}

\begin{frame}{Intro}[label=t2]
test 2
\uncover<2-> {U2-...\\}
\uncover<3> {U3...\\}
\uncover<2-3> {U23...\\}
\begin{itemize}
\item \uncover<4> {U4...\\}
\item \only<4-> {O4-...\\}
\end{itemize}
\invisible<5>{I5...}
\end{frame}
\subsection{SS2}
\begin{frame}{Intro}
test 3 ...
\begin{itemize}
\item \alert<1>i1
\item \alert<2>i2
\item \alert<3>i3
\end{itemize}
\begin{itemize}
\item <+-| alert@+> a
\item <+-| alert@+> a
\item <+-| alert@+> a
\end{itemize}
\end{frame}

\section{S2}
\begin{frame}
ok ... \\
\hyperlink{t2}{goto t2} \\
\hyperlink{title}{goto title} \\
\hyperlink{title}{\beamergotobutton{goto title}} \\
\begin{block}{bbb}
abc
\end{block}
\begin{alertblock}{bbb}
abc
\end{alertblock}
\end{frame}


\begin{frame} {joke}
\end{frame}


\end{document}
